XkbKeyNumGroups(3) XKB FUNCTIONS XkbKeyNumGroups(3)
NAME
XkbKeyNumGroups - Returns the number of groups of symbols bound to the
key corresponding to keycode
SYNOPSIS
int XkbKeyNumGroups (XkbDescPtr xkb, KeyCode keycode);
ARGUMENTS
xkb Xkb description of interest
keycode
keycode of interest
DESCRIPTION
The group_info field of an XkbSymMapRec is an encoded value containing
the number of groups of symbols bound to the key as well as the specifi-
cation of the treatment of out-of-range groups. It is legal for a key to
have zero groups, in which case it also has zero symbols and all events
from that key yield NoSymbol. To obtain the number of groups of symbols
bound to the key, use XkbKeyNumGroups. To change the number of groups
bound to a key, use XkbChangeTypesOfKey. To obtain a mask that deter-
mines the treatment of out-of-range groups, use XkbKeyGroupInfo and Xk-
bOutOfRangeGroupInfo.
The keyboard controls contain a groups_wrap field specifying the han-
dling of illegal groups on a global basis. That is, when the user per-
forms an action causing the effective group to go out of the legal
range, the groups_wrap field specifies how to normalize the effective
keyboard group to a group that is legal for the keyboard as a whole, but
there is no guarantee that the normalized group will be within the range
of legal groups for any individual key. The per-key group_info field
specifies how a key treats a legal effective group if the key does not
have a type specified for the group of concern. For example, the Enter
key usually has just one group defined. If the user performs an action
causing the global keyboard group to change to Group2, the group_info
field for the Enter key describes how to handle this situation.
Out-of-range groups for individual keys are mapped to a legal group us-
ing the same options as are used for the overall keyboard group. The
particular type of mapping used is controlled by the bits set in the
group_info flag, as shown in Table 1.
Table 1 group_info Range Normalization
──────────────────────────────────────────────
Bits set in group_info Normalization method
──────────────────────────────────────────────
XkbRedirectIntoRange XkbRedirectIntoRange
XkbClampIntoRange XkbClampIntoRange
none of the above XkbWrapIntoRange
The Xkb extension is composed of two parts: a server extension, and a
client-side X library extension. This chapter discusses functions used
to modify controls effecting the behavior of the server portion of the
Xkb extension. X Library Controls discusses functions used to modify
controls that affect only the behavior of the client portion of the ex-
tension; those controls are known as Library Controls.
Xkb contains control features that affect the entire keyboard, known as
global keyboard controls. Some of the controls may be selectively en-
abled and disabled; these controls are known as the Boolean Controls.
Boolean Controls can be turned on or off under program control and can
also be automatically set to an on or off condition when a client pro-
gram exits. The remaining controls, known as the Non-Boolean Controls,
are always active. The XkbControlsRec structure describes the current
state of most of the global controls and the attributes effecting the
behavior of each of these Xkb features. This chapter describes the Xkb
controls and how to manipulate them.
There are two possible components for each of the Boolean Controls: at-
tributes describing how the control should work, and a state describing
whether the behavior as a whole is enabled or disabled. The attributes
and state for most of these controls are held in the XkbControlsRec
structure.
You can manipulate the Xkb controls individually, via convenience func-
tions, or as a whole. To treat them as a group, modify an XkbControlsRec
structure to describe all of the changes to be made, and then pass that
structure and appropriate flags to an Xkb library function, or use a Xk-
bControlsChangesRec to reduce network traffic. When using a convenience
function to manipulate one control individually, you do not use an Xkb-
ControlsRec structure directly.
The Xkb controls are grouped as shown in Table 2.
Table 2 Xkb Keyboard Controls
───────────────────────────────────────────────────────────────
Type of Control Control Name Boolean Control?
───────────────────────────────────────────────────────────────
Controls for en- EnabledControls No
abling and disabling AutoReset No
other controls
───────────────────────────────────────────────────────────────
Control for bell be- AudibleBell Boolean
havior
───────────────────────────────────────────────────────────────
Controls for repeat PerKeyRepeat No
key behavior RepeatKeys Boolean
DetectableAutorepeat Boolean
───────────────────────────────────────────────────────────────
Controls for Overlay1 Boolean
keyboard overlays Overlay2 Boolean
───────────────────────────────────────────────────────────────
Controls for using MouseKeys Boolean
the mouse from the MouseKeysAccel Boolean
keyboard
───────────────────────────────────────────────────────────────
AccessXFeedback Boolean
Controls for better AccessXKeys Boolean
keyboard access by AccessXTimeout Boolean
physically impaired BounceKeys Boolean
persons SlowKeys Boolean
StickyKeys Boolean
───────────────────────────────────────────────────────────────
GroupsWrap No
Controls for general IgnoreGroupLock Boolean
keyboard mapping IgnoreLockMods No
InternalMods No
───────────────────────────────────────────────────────────────
The individual categories and controls are described first, together
with functions for manipulating them.
STRUCTURES
The KeySymMapRec structure is defined as follows:
#define XkbNumKbdGroups 4
#define XkbMaxKbdGroup (XkbNumKbdGroups-1)
typedef struct { /* map to keysyms for a single keycode */
unsigned char kt_index[XkbNumKbdGroups]; /* key type index for each group */
unsigned char group_info; /* # of groups and out of range group handling */
unsigned char width; /* max # of shift levels for key */
unsigned short offset; /* index to keysym table in syms array */
} XkbSymMapRec, *XkbSymMapPtr;
The XkbControlsRec structure is defined as follows:
#define XkbMaxLegalKeyCode 255
#define XkbPerKeyBitArraySize ((XkbMaxLegalKeyCode+1)/8)
typedef struct {
unsigned char mk_dflt_btn; /* default button for keyboard driven mouse */
unsigned char num_groups; /* number of keyboard groups */
unsigned char groups_wrap; /* how to wrap out-of-bounds groups */
XkbModsRec internal; /* defines server internal modifiers */
XkbModsRec ignore_lock; /* modifiers to ignore when checking for grab */
unsigned int enabled_ctrls; /* 1 bit => corresponding boolean control enabled */
unsigned short repeat_delay; /* ms delay until first repeat */
unsigned short repeat_interval; /* ms delay between repeats */
unsigned short slow_keys_delay; /* ms minimum time key must be down to be ok */
unsigned short debounce_delay; /* ms delay before key reactivated */
unsigned short mk_delay; /* ms delay to second mouse motion event */
unsigned short mk_interval; /* ms delay between repeat mouse events */
unsigned short mk_time_to_max; /* # intervals until constant mouse move */
unsigned short mk_max_speed; /* multiplier for maximum mouse speed */
short mk_curve; /* determines mouse move curve type */
unsigned short ax_options; /* 1 bit => Access X option enabled */
unsigned short ax_timeout; /* seconds until Access X disabled */
unsigned short axt_opts_mask; /* 1 bit => options to reset on Access X timeout */
unsigned short axt_opts_values; /* 1 bit => turn option on, 0=> off */
unsigned int axt_ctrls_mask; /* which bits in enabled_ctrls to modify */
unsigned int axt_ctrls_values; /* values for new bits in enabled_ctrls */
unsigned char per_key_repeat[XkbPerKeyBitArraySize]; /* per key auto repeat */
} XkbControlsRec, *XkbControlsPtr;
The XkbControlsRec structure is defined as follows:
#define XkbMaxLegalKeyCode 255
#define XkbPerKeyBitArraySize ((XkbMaxLegalKeyCode+1)/8)
typedef struct {
unsigned char mk_dflt_btn; /* default button for keyboard driven mouse */
unsigned char num_groups; /* number of keyboard groups */
unsigned char groups_wrap; /* how to wrap out-of-bounds groups */
XkbModsRec internal; /* defines server internal modifiers */
XkbModsRec ignore_lock; /* modifiers to ignore when checking for grab */
unsigned int enabled_ctrls; /* 1 bit => corresponding booleancontrol enabled */
unsigned short repeat_delay; /* ms delay until first repeat */
unsigned short repeat_interval; /* ms delay between repeats */
unsigned short slow_keys_delay; /* ms minimum time key must be down to be ok */
unsigned short debounce_delay; /* ms delay before key reactivated */
unsigned short mk_delay; /* ms delay to second mouse motion event */
unsigned short mk_interval; /* ms delay between repeat mouse events */
unsigned short mk_time_to_max; /* # intervals until constant mouse move */
unsigned short mk_max_speed; /* multiplier for maximum mouse speed */
short mk_curve; /* determines mouse move curve type */
unsigned short ax_options; /* 1 bit => Access X option enabled */
unsigned short ax_timeout; /* seconds until Access X disabled */
unsigned short axt_opts_mask; /* 1 bit => options to reset on Access X timeout */
unsigned short axt_opts_values; /* 1 bit => turn option on, 0=> off */
unsigned int axt_ctrls_mask; /* which bits in enabled_ctrls to modify */
unsigned int axt_ctrls_values; /* values for new bits in enabled_ctrls */
unsigned char per_key_repeat[XkbPerKeyBitArraySize]; /* per key auto repeat */
} XkbControlsRec, *XkbControlsPtr;
SEE ALSO
XkbChangeTypesOfKey(3), XkbKeyGroupInfo(3), XkbOutOfRangeGroupInfo.(3)
X Version 11 libX11 1.8.12 XkbKeyNumGroups(3)
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